- CollectionCamb. Medieval History - Papers relating to the Cambridge Medieval History Series
- SeriesBox 1-2 - Letters to and from contributing historians to Cambridge Medieval History
- SubseriesBox 1 - Letters relating to historians A-L
- File33 - Letters from H. D. Hazeltine
- Item1 - Autograph letter, signed, to J. R. Tanner from C. H. Haskins, Cambridge
- Item2 - Autograph letter, signed, to J. R. Tanner from H. D. Hazeltine, Cambridge
- Item3 - Dictated letter to J. R. Tanner from H. D Hazeltine, Cambridge
- Item4 - Autograph letter, signed, to J. R. Tanner from H. D. Hazeltine, Cambridge